<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="jQuery/jquery-1.11.3.js"></script>
</head>
<body>
   <input type="text"  name="na" value="文本">
    <script>
        var s2 = $('input').removeAttr('value');     //删除属性
        console.log(s2)

    </script>
</body>
</html>